Introduction to Functions

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Objective

SWBAT define a function using standard mathematical terminology.

Big Idea

What is a function? Inputs and outputs - how do you know if something is a function?

Warm-up

10 minutes

Each day, students complete a warm-up that usually consists of spiraling the previous day's material, in addition to older material.  Warm-up problems also sometimes extend lessons that students have encountered before to more unfamiliar contexts. In this case, the warm-up has two spiraled review, straightforward question giving kids practice in evaluating expressions.

Number 3 is a more challenging application problem. I will insert challenges at the end of the warmup over the next few days.  For this one, I like to make a table that identifies the first integer as x, and then define the other two integers as x + 1 and x + 1 + 1 (I draw an arrow with "+1" on it from these two columns).  Then, I always say, "To figure out one unknown, what do we need?  (An equation.)"

Play of the Day

40 minutes

Homework

15 minutes

The homework includes questions related to this lesson, as well as spiraled review.  I also provide answers to the problems on page 2.